An issue was discovered in Yubico libykpiv before 2.1.0. An attacker can trigger an incorrect free() in the ykpiv_util_generate_key() function in lib/util.c through incorrect error handling code. This could be used to cause a denial of service attack.

References

• https://nvd.nist.gov/vuln/detail/CVE-2020-13132
• https://blog.inhq.net/posts/yubico-libykpiv-vuln/
• https://www.yubico.com/support/security-advisories/ysa-2020-02/